Trunk floor and side panels often vibrate under heavy low-frequency playback, causing bass to lose definition inside the cabin. SoundSkins Global Classic is designed to add dense damping to these surfaces, stabilizing metal panels and minimizing resonance from subwoofer output or road vibrations. Installing Classic sheets in these areas prevents energy from traveling forward and interfering with midrange clarity. This treatment also absorbs internal reflections within hollow compartments, helping maintain tighter, more controlled low-end response. By reducing unwanted panel movement, SoundSkins Classic allows the audio system to perform with improved tonal balance and cleaner bass, enhancing the overall listening experience without modifying speakers or amplifiers.